微通道反应器内CO的选择性甲烷化净化

为了有效去除富氢重整气体中少量的CO,将4Ni-2Ru/ZrO_2双金属催化剂均匀涂布到微通道反应器中,运用CO选择性甲烷化方法来净化CO.考察了焙烧温度、催化剂的涂布方法、CTAB/Zr摩尔比和空速对催化剂性能的影响.实验结果表明:CTAB/Zr的摩尔比为0.35、空速为14286h~(-1)、每次涂布催化剂浆液后350℃下焙烧时,所制备的催化剂表现出良好的低温活性,反应温度为260℃时可将CO的出口含量降低到0.0013%(体积分数);CTAB/Zr摩尔比为0.35、每次涂布浆液后350℃下焙烧的催化剂,适宜的空速范围为13000～20000h~(-1).

Purification of CO via Selective Methanation Using Microchannel Reactor

In order to effectively remove the small-quantity CO in hydrogen-rich reformed gas, 4Ni-2Ru/ZrO_2 bimetallic catalyst was homogeneously coated on a microchannel reactor, and the method of selective methanation was used to purify CO. Then, the effects of calcination temperature, coating method, CTAB/Zr molar ratio and space velocity on the catalyst performance were investigated. Experimental results show that (1) when the calcination is performed at 350℃ after each slurry loading with a CTAB/Zr molar ratio of 0.35 and with a space velocity of 14286h~(-1), 4Ni-2Ru/ZrO_2 catalyst is of excellent performance in low temperature, and the volume fraction of CO at the outlet reduces to 0.0013% at 260℃;and (2) a space velocity of 13000～20000h~(-1) is suitable for the catalyst calcined at 350℃ after each slurry loading with a CTAB/Zr molar ratio of 0.35.